68156899 has 2 divisors, whose sum is σ = 68156900. Its totient is φ = 68156898.

The previous prime is 68156897. The next prime is 68156911. The reversal of 68156899 is 99865186.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 68156899 - 2¹ = 68156897 is a prime.

Together with 68156897, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (68156897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34078449 + 34078450.

It is an arithmetic number, because the mean of its divisors is an integer number (34078450).

Almost surely, 2^68156899 is an apocalyptic number.

68156899 is a deficient number, since it is larger than the sum of its proper divisors (1).

68156899 is an equidigital number, since it uses as much as digits as its factorization.

68156899 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 933120, while the sum is 52.

The square root of 68156899 is about 8255.7191691578. The cubic root of 68156899 is about 408.4791943528.

The spelling of 68156899 in words is "sixty-eight million, one hundred fifty-six thousand, eight hundred ninety-nine".